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Densi.y functi.nal theory study on the role of ternary alloyi.g elements i. Ti.e-based hydrogen storage alloys

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j.urnal of Materi.ls Sci.nce & Technology 2021年第33期92卷 148-158页

作者： Won-Seok Ko Ki.Beom Park Hyung-Ki.Park School of Materi.ls Sci.nce and Engi.eeri.g University of UlsanUlsan 44610Republic of Korea Functi.nal Materi.ls and Components R&D Group Korea Institute of Industrial TechnologyGangneung 25440Republic of Korea

The role of addi.i.nal ternary alloyi.g elements on the performance of stati.nary Ti.e-based hydrogen storage alloys was i.vesti.ated based on fi.st-pri.ci.les densi.y functi.nal theory *** a basi. step for exami.ati.ns,the si.e preference of each alloyi.g element i. the stoi.hi.metri. and nonstoi.hi.metri. B2Ti.e compounds was clari.i.d consi.eri.g possi.le anti.i.e *** on the revealed si.e preference,the effect of vari.us possi.le ternary elements on the hydrogen storage was exami.ed by focusi.g on the formati.n enthalpi.s of Ti.eH and Ti.eH_(2) hydri.es,whi.h were closely related to the change i. the locati.n of plateaus i. the pressure-composi.i.n-temperature *** physi.al properti.s such as the volume expansi.n due to hydri.e formati.n were also exami.ed to provi.e addi.i.nal cri.eri. for selecti.g opti.um alloyi.g condi.i.ns i. future alloyi.g desi.n *** alloyi.g elements that maxi.i.e the grai. boundary embri.tlement due to the solute segregati.n were proposed for the enhanced i.i.i.l acti.ati.n of Ti.e-based hydrogen storage alloys.

关键词： Hydrogen storage alloy Ti.ani.m-i.on Densi.y functi.nal theory calculati.n Metalli. hydri.e

Predi.ti.g elasti. properti.s of hard-coati.g alloys usi.g ab-i.i.i. and machi.e learni.g methods

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npj.Computati.nal Materi.ls 2022年第1期8卷 139-148页

作者： H.Levämäki.F.Tasnádi.D.G.Sangi.vanni.L.j.S.j.hnson R.Armi.nto i.A.Abri.osov Department of Physi.s Chemistry and BiologyLinköping UniversitySE-58183LinköpingSweden Sandvi. Coromant S-12680StockholmSweden Materi.ls Modeli.g and Development Laboratory National University of Science and Technology‘MISIS’119049MoscowRussia

Accelerated desi.n of hard-coati.g materi.ls requi.es state-of-the-art computati.nal tools,whi.h i.clude data-dri.en techni.ues,bui.di.g databases,and trai.i.g machi.e learni.g *** develop a heavi.y automated hi.h-throughput workflow to bui.d a database of i.dustri.lly relevant hard-coati.g materi.ls,such as bi.ary and ternary *** use the hi.h-throughput toolki. to automate the densi.y functi.nal theory calculati.n *** present results,i.cludi.g elasti. constants that are a key parameter determi.i.g mechani.al properti.s of hard-coati.gs,for X_(1−x)Y_(x)N ternary ni.ri.es,where X,Y∈{Al,Ti.Zr,Hf}and fracti.n x=0,1/4,1/2,3/4,*** also explore ways for machi.e learni.g to support and complement the desi.ned *** fi.d that the crystal graph convoluti.nal neural network trai.ed on ordered latti.es has suffi.i.nt accuracy for the di.ordered ni.ri.es,suggesti.g that exi.ti.g databases provi.e i.portant data for predi.ti.g mechani.al properti.s of quali.ati.ely di.ferent types of materi.ls,i. our case di.ordered hard-coati.g alloys.

关键词： coati.g alloys ternary

i.?uence of Carbon Equi.alent Value on the Weld Bead Bendi.g Properti.s of Hi.h-Strength Low-Alloy Steel Plates

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j.urnal of Materi.ls Sci.nce & Technology 2017年第4期33卷 321-329页

作者： Ki.Hyuk Ki. i. j.n Moon Ki.Won Ki. Ki.Bong Kang Byung Gyu Park Kwang Seok Lee R&D Center of Dongkuk Steel Mi.l Co. Ltd Pohang 790-729 South Korea Korea i.sti.ute of Materi.ls Sci.nce Implementation Research Division Materials Deformation Department 797 Changwondaero Changwon Gyeongnarn642-831 South Korea

The contri.uti.n of chemi.al composi.i.ns i. terms of carbon equi.alent value（CEV） on i.pendi.g crack propagati.n duri.g weld bead bend tests（WBBTs） was studi.d wi.h fi.e di.ferent hi.h-strength lowalloy steel plates that underwent di.ferent rolli.g processes. The test showed that cracks developed at the weld j.i.t, easi.y passed through the coarse-grai. heat-affected zone（CGHAZ）, and fi.ally were arrested wi.hi. the heat-affected zone（HAZ）. An apparent decrease i. the average crack length, whi.h consequently i.di.ated i.provement i. crack arrestabi.i.y, was found wi.h decreasi.g CEV. i. addi.i.n,the relati.ely fi.e mi.rostructure i. the HAZ of low-CEV steel plates helped i. preventi.g the crack from further propagati.n. Speci.l emphasi. was placed on the empi.i.al expectati.n of cri.i.al CEV above whi.h WBBT mi.ht fai..

关键词： Mechani.al characteri.ati.n Steel Weldi.g Fracture Crack arrestabi.i.y agai.st bendi.g

Di.gnosti. analysi. of the asymmetri. structure of the si.ulated landfalli.g typhoon “Hai.ang”

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Progress i. Natural Sci.nce:Materi.ls i.ternati.nal 2008年第10期18卷 1249-1260页

作者： Ki.Ryong Kang Nati.nal i.sti.ute of Meteorologi.al Research KMASeoulRepublic of Korea

The landfai.i.g processes of Typhoon"Hai.ang"near Li.nj.ang of Fuj.an Provi.ce of Chi.a from 00 UTC 19 to 12 UTC 20 j.ly 2005 were reproduced by usi.g the nesti.g non-hydrostati. WRF model and data assi.i.ati.n technology (LevelⅡDoppler radar data of Changle of Fuj.an Provi.ce are assi.i.ated to the si.ulati.n every one hour from 01 to 06 UTC 19 j.ly 2005).The mesoscale structure and evoluti.n of the typhoon before,duri.g,and after i.s landfall were *** si.ulati.n data show that the assi.i.ati.n exper- i.ent wi.h the hi.h temporal-and-spati.l-resoluti.n radar radi.l veloci.y and reflecti.i.y data can produce much better si.ulati.n of the typhoon track,i.tensi.y evoluti.n and landfalli.g locati.n than the control experi.ent wi.hout assi.i.ati.g radar *** usi.g the assi.i.ati.n experi.ental data,the mesoscale fi.e-mesh structure and evoluti.n before and after typhoon landfall were analyzed. Because of the i.fluence of sea-land thermodynami. di.ference,two asymmetri. convecti.e regi.ns were located at ocean and land, *** better understand and i.vesti.ate the asymmetri.-structure characteri.ti.s of the landfalli.g typhoon,several dynami.al di.gnosti. tools,the heli.i.y (H),the moi.t potenti.l vorti.i.y (MPV),the convecti.e vorti.i.y vector (CVV),the moi.t vorti.i.y vector (MVV),whi.h are associ.ted wi.h the development of strong convecti.ns,are *** analysi. i.lumi.ates that the di.tri.u- ti.ns of these physi.al di.gnosti. parameters are totally asymmetri.,and subsequently,the associ.ted convecti.ns also show di.ti.ct asymmetry.

关键词： Typhoon Landfall Convecti.e vorti.i.y vector Moi.t vorti.i.y vector

New para-magneti.(CoFeNi.(50)(CrMo)(50-x)(CB)x(x=20,25,30)non-equi.tomi. hi.h entropy metalli. glasses wi.h wi.e supercooled li.ui. regi.n and excellent mechani.al properti.s

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j.urnal of Materi.ls Sci.nce & Technology 2020年第8期36卷 135-143页

作者： j.ong Tae Ki. Sung Hwan Hong j.n Man Park j.rgen Eckert Ki.Buem Ki. Eri.h Schmi. i.sti.ute of Materi.ls Sci.nce Austrian Academy of Sciences(ÖAW)Jahnstrae 128700LeobenAustria Hybri. Materi.ls Center(HMC) Department of Nanotechnology and Advanced Materials EngineeringSejong University209Neungdong-roGwangjin-guSeoul143-747Republic of Korea Global Technology Center(GTC) Samsung Electronics Co.Ltd129 Samsung-roYeongtong-guSuwonsiGyeonggi-do443-742Republic of Korea Department of Materi.ls Sci.nce Chair of Materials PhysicsMontanuniversität LeobenJahnstraße 128700LeobenAustria

i. thi. study,hi.h entropy metalli. glasses(HEMGs)were developed through a combi.ati.n of concepts for desi.ni.g metalli. glasses(mai. element+transi.i.n metal+metalloi. element)and hi.h-entropy alloys(more than fi.e elements,each element havi.g an atomi. concentrati.n between 5 at.%and 35 at.%).The developed metalli. glass alloys are composed of Co-Fe-Ni.mai. elements,transi.i.n metals(Cr,Mo)and metalloi. elements(C,B).Moreover,the present work reports the thermal,mechani.al and magneti. properti.s of(CoFeNi.(50)(CrMo)(50-x)(CB)x alloys wi.h x=20,25,*** developed as-spun HEMGs exhi.i. typi.al paramagneti. properti.s even for a hi.h amount of ferromagneti. elements(Co,Fe,and Ni.and have hi.h elasti. modulus(103–160 GPa)and hardness(14–27 GPa),thus possessi.g mechani.al properti.s si.i.ar to well-known Co-based metalli. glasses(Co-Cr-Mo-C-B system).i. addi.i.n,some of the bulk samples prepared wi.h a di.meter of 2 mm form bulk metalli. glasses wi.h a hi.h compressi.e strength around 3.5 *** mechani.ms determi.i.g the stabi.i.y of the supercooled li.ui.,as well as the paramagneti. and mechani.al properti.s for the developed non-equi.tomi. HEMGs,are di.cussed.

关键词： Metalli. glasses Paramagneti.m Hi.h entropy alloys Phase stabi.i.y

i.frageneri. relati.nshi.s of Korean Vi.la based on ei.ht chloroplast markers

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j.urnal of Systemati.s and Evoluti.n 2010年第6期48卷 474-481页

作者： Ki.Oug YOO Su-Ki. j.NG Department of Bi.logi.al Sci.nces Kangwon National University

Phylogeny and i.frageneri. relati.nshi.s were reconstructed for Korean Vi.la(Vi.laceae) usi.g ei.ht chloroplast sequences:the atpB-rbcL i.tergeni. spacer,the atpF-H i.tergeni. spacer,the matK gene,the psbA-trnH i.tergeni. spacer,the psbK-i.i.tergeni. spacer,the rpl16 i.tron,the rpoC1 exon 2,and the trnL-trnF *** combi.ed analyses of the ei.ht chloroplast regi.ns suggest that secti.ns Di.chi.i.m and Chamaemelani.m are monophyleti.,whereas secti.n Nomi.i.m i. paraphyleti.;secti.ns Di.chi.i.m and Chamaemelani.m form a clade wi.h subsecti.ns Hypocarpae and Tri.onocarpae of secti.n Nomi.i.m,but unresolved wi.hi. the clade;two subsecti.ns(*** and Vagi.atae) of secti.n Nomi.i.m form a clade and are placed between the stem and stemless speci.s group;and subsecti.n Patellares of secti.n Nomi.i.m i. monophyleti.,and Vi.la di.secta i. di.erged fi.st i. the clade wi.h hi.h support(BS = 100,PP = 100).Our present results support the subsecti.nal groupi.g based on morphologi.al characteri.ti.s,although di.cordance remai.ed at the seri.s level.

关键词： chloroplast DNA i.frageneri. relati.nshi.s phylogeny seri.s subsecti.n Vi.la.

Appli.ati.n of the ground cooli.g system for rural houses ai. condi.i.ni.g i. northeastern Chi.a

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i.ternati.nal j.urnal of Agri.ultural and Bi.logi.al Engi.eeri.g 2022年第2期15卷 230-235页

作者： Moon Ki.j.ng College of i.formati.n&Electri. Engi.eeri.g Shenyang Agricultural UniversityShenyang 110161China

Thi. study developed an appropri.te ground cooli.g system that can be used for i.door cooli.g duri.g summers i. rural houses i. northeastern *** apply thi. system,a tradi.i.nal rural house was selected and a heat exchanger was desi.ned(PE pi.e,32 m i. length),manufactured,and i.stalled accordi.g to the cooli.g load(2206 kj.h)of one room of the experi.ental *** to the experi.ent,the temperature of Room 1 equi.ped wi.h the cooli.g system was 3℃ lower than that of Room 2 wi.hout the ground cooli.g system duri.g the same ti.e *** temperature reducti.n effect of thi. system was confi.med through thi. *** the ground cooli.g system was used i. rural houses i. Northeast Chi.a,i. was found that a buri.l depth of 1.5-2.0 m for the ground heat exchanger i. appropri.te for consi.eri.g workabi.i.y and frost *** use of the ground cooli.g system for i.door cooli.g duri.g summers for rural houses i. the northeastern regi.n of Chi.a would reduce not only envi.onmental polluti.n and the use of fossi. fuels but also ease farmers off a certai. amount of fi.anci.l burden.

关键词： ground cooli.g system ground heat exchanger ai. condi.i.ni.g system rural houses

Evaluati.n of Mechani.al Properti.s Accordi.g to Nb Content of Hi.h Strength Steel Manufactured i. Vi.

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j.urnal of Materi.ls Sci.nce & Technology 2008年第5期24卷 793-796页

作者： Byung-Hui.Choi.Byung-Ki.Choi Department of Mechani.al Engi.eeri.g Graduate SchoolChosun UniversityKorea Department of Mechani.al Engi.eeri.g Chosun UniversityGwang-ju 501-750Korea

As the ai.craft and aerospace i.dustry and the automobi.e i.dustry are developed, the demand of reli.ble materi.ls wi.h hi.h strength and hi.h toughness i. steadi.y i.creased. The grai. mi.i.ture method whi.h i.proves the ducti.i.y and the toughness si.ultaneously under hi.h strength i. the mi.i.ture of the casti.g mi.rostructure. i. thi. paper, the Nb whi.h affects the austeni.e grai. mi.i.ture i. added by 0.00%, 0.03% and 0.06% i. thi. steel and the i.got i. manufactured i. a vacuum i.ducti.n melti.g furnace （Vi.）. The casti.g mi.rostructure and the mechani.al property of the maragi.g steel accordi.g to Nb contents are analyzed by conducti.g the soluti.n anneali.g and the age hardeni.g after hot rolli.g. i. thi. result, a speci.en contai.i.g 0.03% Nb i. most mi.i.ture. When i. does the long ti.e age hardeni.g, the preci.i.ati.n esti.ated as the carbi.e i. appeared. The mechani.al properti.s are excellent i. a speci.en contai.i.g 0.06% Nb does the age hardeni.g duri.g 8 h i. 482℃.

关键词： Hi.h strength steel Maragi.g steel Nb Vacuum i.ducti.n melti.g furnace (Vi.)

Hi.gs boson searches at the Tevatron

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Fronti.rs of physi.s 2013年第3期8卷 270-284页

作者： Gavi. j. Davi.s i.peri.l College London London SW7 2AZ United Kingdom

Thi. arti.le revi.ws the Hi.gs searches at the Tevatron, as presented over the summer of 2012; both standard model （SM） and beyond the standard model （BSM） results are di.cussed as detai.ed （arXi.： 1207.0449; Phys. Rev. Lett., 2012, 109： 071804; Phys. Rev. D, 2012, 85： 032005）. We di.cuss the combi.ati.n of searches by the CDF and DO Collaborati.ns for the standard model Hi.gs boson i. the mass range 100-200 GeV/c2 produced i. the the gg →H, WH, ZH, tfH, and vector boson fusi.n producti.n modes, and decayi.g i. the H → bb, H → W＋W-, H → ZZ, H →π＋π-, and H →γγ modes. The data, collected at the Fermi.ab Tevatron colli.er i. p/5 colli.i.ns at √s = 1.96 TeV, correspond to i.tegrated lumi.osi.i.s of up to 10 fb^-1. i. the absence of si.nal, we expect to exclude the regi.ns 100 〈 mH 〈 120 GeV/c2 and 139 〈 mH 〈 184 GeV/c2. We exclude, at the 95% C.L., two regi.ns： 100 〈 mH 〈 103 GeV/c2, and 147 〈 mH 〈 180 GeV/c2. We observe a si.ni.i.ant excess of events i. the mass range between 115 and 140 GeV/c2. The local si.ni.i.ance corresponds to 3.0 standard devi.ti.ns at mH = 120 GeV/ce; the global si.ni.i.ance （i.corporati.g the lookelsewhere effect） for such an excess anywhere i. the full mass range i.vesti.ated i. approxi.ately 2.5 standard devi.ti.ns. Furthermore, we separately combi.e searches for H→ bb-, H → W＋W- and H →γγ. We fi.d that the excess i. concentrated i. the H →bb channel, appeari.g i. the searches over a broad range of raN; the maxi.um local si.ni.i.ance of 3.3 standard devi.ti.ns corresponds to a global si.ni.i.ance of approxi.ately 3.1 standard devi.ti.ns. The observed si.nal strengths i. all channels are consi.tent wi.h the expectati.n for a standard model Hi.gs boson at mH = 125 GeV/c2. The producti.n of neutral Hi.gs bosons i. associ.ti.n wi.h b-quarks can be si.ni.i.antly enhanced i. vari.us beyond the standard model scenari.s, i.cludi.g Supersymmetry. The recent combi.ati.n of such searches from the two collaborati.ns i. di.cussed.

关键词： Hi.gs Tevatron